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Computer Networking

Computer Networking
Which transmission mode is used for data communication along telephone lines?

None of these
Synchronous
Serial
Parallel
Asynchronous

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Computer Networking
Many data communication networks have been established which provide a wealth of on-demand information services to people at home. What is the name of the system which provides an interactive, graphics-rich service that permits user to select what they want?

Videotex system
Fax system
Microwave system
Teletex system
None of these

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Computer Networking
Number of Unguided Media is:

3
5
6
4

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Computer Networking
Which statements are true regarding ICMP packets?1. They acknowledge receipt of a TCP segment.2. They guarantee datagram delivery.3. They can provide hosts with information about network problems.4. They are encapsulated within IP datagrams.

1 only
3 and 4
2 and 3
2, 3 and 4

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Computer Networking
Which of the following are valid ways to refer only to host 172.16.30.55 in an IP access list? 1. 172.16.30.55 0.0.0.255 2. 172.16.30.55 0.0.0.0 3. any 172.16.30.55 4. host 172.16.30.55 5. 0.0.0.0 172.16.30.55 6. ip any 172.16.30.55

3 and 5
2 and 4
1 and 4
1, 4 and 6

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Computer Networking
Eight stations are competing for the use of the shared channel using the modified Adaptive free walk protocol by Gallager. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?

14 slots
5 slots
None of these
1 slots
10 slots

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